Answer: the availability of water power.
During the Industrial Revolution, the textile industry was mechanized and increasingly done in an industrial scale. One of the most important additions was the fully mechanized water-power system that Samuel Slater brought from England. He smuggled (as it was against the law) his knowledge of textile machinery to the United States, and in 1793, established a cotton-spinning mill in Pawtucket, Rhode Island. The availability of water power made this a perfect location. He went on to build several more cotton and wool mills throughout New England.
The phrase "Iron Curtain" was first used by former British Prime Minister d;Winston Churchill.
He spoke the words on March 5, 1946, in Fulton, Missouri, during a speech. He became famous for what he said.
Churchill's speech was a big moment in the start of the Cold War. It showed how the Western countries and the Soviet Union were becoming more divided. This division was represented by the imaginary "Iron Curtain" that separated the communist-controlled Eastern Europe from the democratic Western Europe. The phrase "Iron Curtain" was commonly used to talk about the separation and differences between the Eastern and Western sides during the Cold War.
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The correct answer is D.) To prohibit US citizens from disclosing any information related to the war.